Speed-reducer for power-generators.



J. G. OKELLY.

SPEED REDUGER FOR POWER GENERATORS.

APPLICATION FILED SEPT. 16, 190:].

Patented Mar. 14, 1911.

'2 SHEETS-SHEET 1.

J. G. OKELLY.

SPEED REDUOER FOR POWER GENERATORS.

APPLIUATION FILED 511213.16, 1907.

986,588, Patented Mar. 14, 1911.

2 SHEETS-SHBET 2.

JOSEPH G. OKELLY, OF CHICAGO, ILLINOIS.

SPEED-REDUCER ron rownnrennnna'rons.

Specification of Letters ratent.

Patented Mar. 14, 1911.

Application filed September 16, 1907. Serial No. 393,171.

To all whom it may concern:

Be it known that I, JOSEPH a citizen of the United States, and aresident of Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Speed-Reducers forPower-Generators, of which the following is a full, clear, and exactdescription.

My invention relates to speed reducing and power increasing devicesconstructed according to Letters Patent of the United States, granted tome June 27, 1905, for speed reducing device for motors and dynamos, No.793,218.

The object of my invention is to adapt such a reducer, of a given size,by the introduction of comparatively slight changes in its internalconstruction, for use in reducing the Speed of'power generators ofdifferent horse-powers, and thus greatly economize the cost of makingthe same, by avoiding the necessity of building anew a different sizedspeed reducer each time a reducer for a generator of difierent power iswanted; and a further ob ect is to permit of the use of a speed reducerno matter in'what posi{ tion it is placed, or whether its axis ishorizontal or vertical. This I accomplish by the means hereinafter fullydescribed and as particularly pointed out in the claims.

In the draw1ngs:-Figure 1 is a longitudinal central section of myimproved speed reducer. Fig. 2 is a transverse section taken on dottedline 2, 2, Fig. 1. Fig. 3 is a transverse section of a full sized idlerjournaling stud. Fig. 4 is a longitudinal section thereof. Fig. 5 is adetail view of the key used in connection with said stud, and Fig. 6 isa detail .view showing in perspective the bush ing for'the bearings ofthe gear having external teeth and located within the casing of thereducer.

The combination of mechanical elements comprised in my invention is thesame as that embodied in the construction of the speed reducer showninythe aforesaid Letters Patent, but the construction of some of theseelements is different so as to permit of the introduction of an elementof the particular size desired, and is also different in some minorrespects so as to prevent the lateral contact, wear and friction thereofno matter in what position the reducer is placed.

My improved speed reducer comprises a G. OKELLY,

bell-shaped case A, the reduced part or boss a of which providesbearings for the elongated cylindrical boss or hub b of the circularplate B located within the case. The

case A may, if desired, have laterally projeeting basal flanges forsupporting it, as shown in Fig. 2 of the drawings, although any othermeans may be employed for supporting the same in any position it isdesired to place it.

The hub of the plate B is secured to the end of the driven shaft G andrevolves therewith, and the inner surface of the boss at of the case isprovided with a bushing c, which has its annular edge next plate Bflanged outward circumferentially to separate the said plate B from theadjacent end wall of the case. A circular packing ring 0 is secured, bymeans of suitable screws, as shown, to the outer circular edge of saidboss on and has its inner circumferential flanged portion enteringbetween the circumference of the hub 7) and boss a, and confinessuitable packing material between it and the adjacent end of bushing 0,serving as a glandnut to confine and prevent the escape of the lubricantemployed in connection with the machine. Shaft C terminates at a point alittle more than half way into the hub 'b, and a reduced extension D ofthe driving shaft E, (whose axis aline's with said shaft has itsadjacent end extended into hub 72 and opposes the end of said shaft C.If desired, an independent pilot-shaft may be employed instead ofextension D, whose ends would be journaled in suitable sockets in theends of shafts C and E. The drive shaft E extends out through suitablehearings in the boss f of the head F closing the mouth of case A,substantially as shown in Fig. 1 of the drawings. Bushing d, similar inconstruction to bushing c, is interposed between the inner circumferenceof the boss f and the journal of shaft E, and has its inner end flangedoutward to separate the kinggear G (mounted on the inner end of shaft E)from the inner surface of head F. The

outer end of the boss 7 is also closed by a ring 01, that is L-shaped incross-section and is otherwise constructed and secured in place byscrews similar to therings c, hereinbefore alluded to.

The bore of the portion of the hub 12 of plate B into which theextension D enters, is increased in diameter, and is provided with abushing g which, preferably, extends from the end of shaft beyond theopposite face of plate B where it is flanged outward to separate theface of said plate from the adjacent endof a king-gear H, which latterhas its' boss or hub extended longitudinally in a direction away fromplate B. The bore of king-gear H has a bushing h interposed between itand extension D, and its endfarthest from plate B, is flanged outward toseparate the adjacent end of the boss of said gear, and the otherking-gear G.

From the'foregoing description it will be seen that, no matter in whatposition the speed reducer is placed, there will be no grindingorfriction' between thead aoent surfaces ofthe'parts of saidreducer'revolving concentric'to the shafts O and E and extension Dthereof.

Plate B is provided with a series of equidistant bearing-studs e, whichare preferably three in number, and are located 'at equal distancesapart from the center of extension D The projecting portions of thesestuds have idle-gears J journaled thereon, that mesh with and engage'theking-gear H, and diametrically opposite thereto engage with the internalgear K. The internal gear is not made integral w1th case A, but consistsof a separate metalring or. annulus whose outer circumferenceeorresponds with the inner'circumference of the case in the transverseplane of the k1nggear H and idlers J, and'it is, preferably, secured inplace by. radially disposed setscrews j, tapped in the same from theout.- side, although it can be'jsecured to the case by brazing orotherwise. Plate I, which s secured to and rotatable with the king-gearH, is also provided with a series of equldistant bearing-studs is,projecting therefrom in a direction opposite to idlers J, the axes ofwhich latter are all the same distance from the center. of the shaft E.There are. preferably, three of these studs, and each has an idle-pinionm journaled thereon, which engages king-gear G on one side, and aninternal-gear M at a'point diametrically opposite. The internal gear Mconsists of a metallic ring,similar to internal gear K.. and is securedto the inner circumference ofthe bell of the case A, nextits mouth oropen end, by set-screws O, that are passed through suitable apertures inthe head F and are each tapped into an opening made partly in the innercircumference of case A and the outer circumference. of said ring. Thismanner of securing. said internal gear in position is both simple andeffective, and accomplishesa considerable saving of labor 'in'assembling the 'parts'of the speed reducer.

- I prefer to so construct studs 6 and k, that their shanks ca'nberemovably inserted and secured in suitable openings made for'theirreception in plates B and I. Iaccomplish this result by'making saidstudstubular, and

- for about one half studs secured at right angles to each other, whoseintersection coincides with the axis ofthe stud.

These slits extend from one end of the stud of its length, and producefour branches 0, 0. The bore of the portion ofthe stud in \which saidslits are made is, preferably, slightly conical, substantially as shownin Fig. 4, and when the slitted end of the stud is properly inserted inits opening in either plate Ior plate B, and a slightly tapered key R,substantially as shown in Fig. 5 of the drawings, is inserted and driveninto the same, small end foremost, the stud is spread within saidopening and is thereby securely held in place.

Between the bore of theidle-pinions J and m, and the circumference ofthe studs e and is, on which they are mounted, I interpose bushings,that consist of two substantially corresponding metallic sleeves r, s,the outer ends of which are flanged circumferentially rying said studsand idlers, and between the head F and idlers m. The length of thesebushings is such that theirinner ends terminate in a transverse planecorresponding to abput the center of thickness of said idler's. v

All of the bushings, to which I have herei'nbefore referred, are made ofbrass or phosphorous bronze,or some other suitable metal for reducingthe friction, and their presence in the construction of the speedreducer not only prevents friction between the parts of the same, butprevents any movement thereof in the directionof the length of theshafts C and E, together with the consequent rattle and noise.

What I claim as new is 2- 1. A speed reducer comprising a suitable ease,alining driving and driven shafts, gearing and gear-carrying plates, aplurality of to and projecting from said plates parallel to said shaftsthe bores of.

said studs being open and tapered at one end, idle gears looselyjournaled on said,

studs, and internal gears engaged by said idle gears, and consisting ofmetal rings removably secured to the interior of said case, and one ofwhich is secured in place next the mouth of said, case by screwsextending through'the adjacent head of the same into openings madepartly, in said ring and partly in the inner circumference of the case.

2. A speed-reducer comprising a suitable case, alining driving anddriven shafts, gearing and gear-carrying plates, a plurality of hollowstuds secured to and projecting from said plates,'-' the bore of saidstuds being smooth and extending throughout the same and having atapered portion at one end, and provided'with slots extendinglongitudinally throughout said tapered ortion, keys fitting the taperedends of the ores of so as to come between the plate carsaid studs,idle-gears journaled on. said studs, and internal gears engaged by saididle-gears.

3. A speed-reducer comprising a suitable case, alining driving anddriven shafts, gearing and gear-carrying plates, a plurality of hollowstuds secured to and projecting from said plates the bore of said studsbeing smooth and extendingentirely through the same and having a taperedportion at one end, and provided with slots extending 1ongitudinallythroughout said tapered portion,

said idle-gears.

wedge-shaped keys having smooth exterior surfaces driven into thetapered endsof the bores of said studs, idle-gears journaled on 15 saidstuds, and internal gears engaged by In testimony whereof I havehereunto set my hand and seal this 14th day of August, A. D., 1907.

JOSEPH G. OKELLY. [L. s.] Witnesses: g

E. K. LUNDY, FRANK D. Tnoismson.

